If you are an optimist who dreams of a better, more just world, then surely you have envisioned a world in which LeBron James participates in the NBA's annual Slam Dunk Contest. What would he do? An alley-oop, perhaps? A free-throw line jam? Or something really cool that we don't even know about yet? Here is your answer, in a six-second video, from the pregame warmup in Miami last night.